Signal processing apparatus, signal processing method, and program

A signal processing method, comprising:

• in a signal processing apparatus:
• collecting a surrounding sound to generate a surrounding sound signal;
• detecting a level of the surrounding sound signal;
• generating a noise canceling signal from the surrounding sound signal;
• generating a cooped-up feeling elimination signal from the surrounding sound signal;
• and
• processing the generated noise canceling signal and the cooped-up feeling elimination signal at a ratio which is based on the level.

A non-transitory computer readable medium having stored thereon, computer-executable instructions for causing a computer to execute operations, the operations comprising:

• collecting a surrounding sound to generate a surrounding sound signal;
• detecting a level of the surrounding sound signal;
• generating a noise canceling signal from the surrounding sound signal;
• generating a cooped-up feeling elimination signal from the surrounding sound signal;
• and
• processing the generated noise canceling signal and the cooped-up feeling elimination signal at a ratio which is based on the level.

A signal processing apparatus, comprising:

• a surrounding sound signal acquisition unit configured to collect a surrounding sound to generate a surrounding sound signal;
• a NC (Noise Canceling) signal generation part configured to generate a noise canceling signal from the surrounding sound signal;
• a cooped-up feeling elimination signal generation part configured to generate a cooped-up feeling elimination signal from the surrounding sound signal;
• an addition part configured to process the generated noise canceling signal and the cooped-up feeling elimination signal at a ratio;
• a storage unit configured to store the cooped-up feeling elimination signal generated by the cooped-up feeling elimination signal generation part;
• and
• a reproduction unit configured to reproduce the cooped-up feeling elimination signal stored in the storage unit.